////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2009 Daniel F. Hanson
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
////////////////////////////////////////////////////////////////////////////////

using System.Linq;

namespace SilverLua.Compiler
{
   public class Compiler
   {
      private Lexer _lexer;
      private Parser _parser;
      
      public Compiler()
      {
         _lexer = new Lexer();
         _parser = new Parser(_lexer);
      }
      
      public Chunk[] Compile(string script)
      {
         //if (!System.Diagnostics.Debugger.IsAttached) System.Diagnostics.Debugger.Launch();
         //System.Diagnostics.Debugger.Break();
         _lexer.Load(script);
         _parser.SymbolTable.Initialize();
         StatementNode[] stmtNodes = _parser.Parse();

         foreach (StatementNode stmt in stmtNodes)
         {
            stmt.GenerateInstructions(_parser, 0);
         }
         
         return (from chunk in _parser.ChunkList
                 select new Chunk(chunk.Instructions.ToArray(),
                                  chunk.RegisterCount,
                                  chunk.Upvalues.ToArray(),
                                  chunk.GetStringTable())).ToArray();
      }
   }
}
